[Mono-bugs] [Bug 441134] New: Lambda types not figured out properly.

[bugzilla_noreply at novell.com]

https://bugzilla.novell.com/show_bug.cgi?id=441134


           Summary: Lambda types not figured out properly.
           Product: Mono: Compilers
           Version: 1.9
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: C#
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: wasabi at larvalstage.net
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---


public static IEnumerable<T> FirstInGroup<T,K>(this IEnumerable<T> self,
Func<T,K> selector)
        {
#if !MONO // Cannot convert `lambda expression' to delegate type
`System.Func<System.Linq.IGrouping<K,T>,T>' because some of the return types in
the block are not implicitly convertible to the delegate return type(CS1662)]
            return self.GroupBy(selector).Select(g => g.First());
#else
                        return self.GroupBy(selector).Select((IGrouping<K,T> g)
=> ((IGrouping<K, T>)g).First<T>());
#endif
        }


That example illustrates the issue. Looks like the lambda passed to .Select is
just interpreted incorrectly. Mono 1.9.1.


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